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Note 7 - Property and Equipment (Detail) - Property and equipment are summarized as follows (in thousands): (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Property, plant and equipment | $ 165,851 | $ 154,761
Less accumulated depreciation | (63,543) | (71,332)
| 102,308 | 83,429
Construction Equipment [Member] |  |
Property, plant and equipment | 130,014 | 125,222
Transportation Equipment [Member] |  |
Property, plant and equipment | 19,266 | 17,963
Building [Member] |  |
Property, plant and equipment | 10,176 | 4,729
Office Equipment [Member] |  |
Property, plant and equipment | 1,279 | 1,077
Construction in Progress [Member] |  |
Property, plant and equipment |  | 2,544
Land [Member] |  |
Property, plant and equipment | 4,916 | 3,026
Water Rights [Member] |  |
Property, plant and equipment | $ 200 | $ 200

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